How to retrieve pictures from a sd card after erasing

Here are simple steps for you to get your pictures back:
1). Stop using this SD card to take any new photo or file in case of farther card data loss.
2). Attach this SD card to your computer and check whether it is detected well there.
3). Search and select a proper memory card data recovery program to scan this card and see how many of your original pictures could be restored.
4). Save and back up all restored card pictures on computer partitions or drives.
Read more information of data recovery software here:
How to restore deleted stuffs from memory card
Make SD card picture backups well from now on.

OK! There is no need to worry too much! You can easily try to get your erased pictures back from this SD card by relying on third-party memory card data recovery software. Many similar card data recovery software has been designed online for users like you to take lost or deleted stuffs back.
If you are really interested, you can check following link to see whether it can help you out:
http://freeware-fix.blogspot.com/2013/03/memory-card-recovery.html
Note: Never overwrite this SD card in case of more data loss.
Make card data backups to avoid such data loss problems from now on.

Why do you erase your SD card pictures? Why do you prepare your card data backups before any deletion, erasing or formatting processes? Next time, no matter what happens, never do such operations without data backups again.
And now, without card pictures backups, you'd better never add new pictures or files on this SD card and insert it well to your Windows computer well.
And then, use SD card data recovery software to rescue your wanted SD card pictures back.
And, at last, save all restored pictures to another storage device and save copies of them on different places.
Read more detailed information here:
http://sd-card-photo-recover.blogspot.com/2013/08/sd-card-photo-recovery.html

Recuva (pronounced"recover") is a freeware Windows utility to restore files that havebeen accidentally deleted from your computer. This includes files emptied fromthe Recycle bin as well as images and other files that have been deleted byuser error from digital camera memory cards or MP3 players. It will even bringback files that have been deleted from your iPod, or by bugs, crashes andviruses!

• Put the memory card into an USB card reader and plug it into the USB port in your computer, then run the Recuva program.
• Simple to use interface - just click 'Scan' and choose the files you want to recover
• Easy to use filter for results based on file name/type
• Simple Windows like interface with List and Tree view
• Can be run from a USB thumb drive
• Restores all types of files, office documents, images, video, music, email, anything.
• Supports FAT12, FAT16, FAT32, exFAT, NTFS, NTFS5 , NTFS + EFS file systems
• Restores files from removable media (SmartMedia, Secure Digital, MemoryStick, Digital cameras, Floppy disks, Jazz Disks, Sony Memory Sticks, Compact Flash cards, Smart Media Cards, Secure Digital Cards, etc.)
• Restores files from external ZIP drives, Firewire and USB Hard drives
• It's fast, tiny and takes seconds to run!